Music-note recorder.



No. 800,453. PATENTED SEPT. 26, 1905.

L. KROMAR.

MUSIC NOTE RECORDER.

APPLIOATION FILED JAN. 27, 1904.

Y M1 3i M I L 1 M4 Cv I 1:1 it A] i M C0 W/ 7715 8858: I V E T1719.

UNITED STATES PATENT OFFICE.

MUSIC-NOTE RECORDER.

Specification of Letters Patent.

Patented Sept. 26, 1905.

Application filed January 27,1904. Serial No. 190,869-

lb all whom, it may concern:

Be it known that I, LAURENZ KRoMAR, chief controller of the town booking-office in Vienna. residing at 19 Lenaugasse, in Vienna VIILAustria-Hungary, have invented certain new and useful Improvements in Music-Note Recorders, of which the following is a specification.

This invention relates to an apparatus by means of which the notes of music-pieces played on keyed instruments may be automatically recorded in the form of single or double lines extending at right angles to the lines of a staff and being arranged exactly so as notes in such a one although the recorded notes extend over a greater length of staff because of their being represented by horizontal lines instead of by the signs ordinarily employed.

The invention is applicable to any system of scale or staff, and the notes can be recorded not only in the forms of lines drawn on paper, but also in the form of perforations or slots punched or otherwise produced in thick paper-or the like, such as ordinarily used in the manufacture of perforated music-sheets. The recorded notes produced by the white keys are distinguished from those produced by the black keys, and the arrangement is such that one note-record may take into another, as will become more clear from the detailed description following.

In the accompanying drawings, Figure 1 is a diagrammatical side view of the principal mechanism of my invention. Fig. 2 is a plan of Fig. 1, the roller a and the paper 0 being left away.

The apparatus has a roller a, the length of which corresponds to the length of the series of keys,and two series of double-armed levers b and 0, located in bearings fupon a frame g. The free ends of the levers 0 are furnished with single-pointed heads or pins 0, and those of the levers b are furnished with similar but double parts I), the former taking into the latter, as represented in Fig. 2. The levers Z) 6 correspond to the white keys; the levers 0 0 to the black ones. Between the points I) 0 and roller a pass over this latter two superposed sheets of paper a and e, the former being the paper upon which the records are. made, the other being copying-paper, the color of which is transferred upon the paper a by means of the points Z) 0 when any number of one or the other set of levers is actuated by electromagnets (Z, of which there is one for each lever. Each electromagnet lies in a circuit containing besides the common source of electricity a contact located below a key, so that on depressing the latter just that electromagnet is excited and just that lever is operated which in its position in one or the other row of levers is capable of indicating or recording the tone produced by the key depressed. The connection between the levers Z) c and the armatures d of the electromagnets (Z is effected by links (Z The arniatures are hinged to the frame 9. Aslong as an armature is attracted the point of the respective lever increases the pressure of the sheet of copying-paper 0 against the sheet of white paper 6 in such a measure that lines are produced upon the sheet 0, the length of the lines indicating the length of time of the note, the single lines (produced by the points 0) indicating the tones produced by the black keys and the double lines (produced by the points 0) indicating the tones produced by the white keys.

The sheet of paper a is provided with groups of lines such as found in a staff.

The means for moving the roller a and the sheets of paper (2 a with proper speed may be of any desired or suitable description.

Having thus described my invention, I claim as new 1. In a music-recorder, in combination, levers for one class of the keys, pivoted to a stationary part and each having adouble-pointed head for striking the traveling record-sheet; and like pivotal levers for the other class of the keys, each having a single-pointed head for striking the sheet, located between the two points of the double-head lever; and means for actuating the said levers; substantially as described.

2. In a music-recorder, in combination, levers for one class of the keys, pivoted to a stationary part and each having a double-pointed head for striking the traveling record-sheet; and like pivotal levers for the other class of the keys, each having a single-pointed head for striking the sheet, located between the two points of the double-head lever; a source of electricity, electromagnets, one of which is located below each lever, connected in cirspective lever; all substantially as described. cult Wlth the said electrlcal source; contact In testimony whereof I have hereunto set devices for each electrornagnet-clrcult, closed my hand 1n presence of two \vltnesses.

on depression of the respective key of the in- LAURENZ KROMAR. strument; and an armature for each electro- \Vitnesses:

magnet, pivoted at one end to a stationary ALVESTO S. HoGUn, pert and linked at the other end to the re- AUGUST FUGGER. 

